ES2141129T3 - Receptor telemetrico de ruido pseudoaleatorio que compensa la distorsion por camino multiple a base de ajustar dinamicamente el intervalo de retardo entre correlaciones tempranas y tardias. - Google Patents
Receptor telemetrico de ruido pseudoaleatorio que compensa la distorsion por camino multiple a base de ajustar dinamicamente el intervalo de retardo entre correlaciones tempranas y tardias.Info
- Publication number
- ES2141129T3 ES2141129T3 ES93300469T ES93300469T ES2141129T3 ES 2141129 T3 ES2141129 T3 ES 2141129T3 ES 93300469 T ES93300469 T ES 93300469T ES 93300469 T ES93300469 T ES 93300469T ES 2141129 T3 ES2141129 T3 ES 2141129T3
- Authority
- ES
- Spain
- Prior art keywords
- early
- prn code
- prn
- late
- composite signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/707—Spread spectrum techniques using direct sequence modulation
- H04B1/7073—Synchronisation aspects
- H04B1/7085—Synchronisation aspects using a code tracking loop, e.g. a delay-locked loop
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/22—Multipath-related issues
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/707—Spread spectrum techniques using direct sequence modulation
- H04B1/709—Correlator structure
Abstract
UN RECEPTOR DE SEÑALES CODIFICADAS DE RUIDOS PSEUDOALEATORIOS (PRN) QUE CONSISTE EN UN CIRCUITO DE MUESTREO, UNA PORTADORA MULTIPLE Y CIRCUITOS DE SINCRONIZACION DE CODIGOS Y MULTIPLES AUTOCORRELACIONADORES DIGITALES. EL CIRCUITO DE MUESTREO PROPORCIONA MUESTRAS DIGITALES DE UNA SEÑAL COMPUESTA RECIBIDA A CADA UNO DE LOS MUCHOS CIRCUITOS DE CANAL RECEPTORES. LOS CIRCUITOS DE SINCRONIZACION SON PREFERENTEMENTE NO COHERENTES, EN EL SENTIDO DE QUE RASTREAN CUALQUIER DESPLAZAMIENTO DE FASE DE LA SEÑAL RECIBIDA Y AJUSTAN EN CONSECUENCIA LA FASE Y LA FRECUENCIA DE UNA SEÑAL DE REFERENCIA PORTADORA GENERADA LOCALMENTE, INCLUSO ANTE LA PRESENCIA DE UNA DISTORSION DOPPLER O IONOSFERICA. LOS AUTOCORRELACIONADORAS QUE HAY EN CADA CANAL FORMAN UN ENCLAVAMIENTO DE FASE DE RETARDO (DLL) QUE CORRELACIONA LAS MUESTRAS DIGITALES DE LA SEÑAL COMPUESTA CON LOS VALORES DE LOS CODIGOS PRN GENERADOS LOCALMENTE PARA PRODUCIR UNA PLURALIDAD DE SEÑALES DE CORELACION (DE ANTICIPACION, DE RETARDO) O (PUNTUALES, ANTICIPACION-MENOS-RETARDO). DE ESTE MODO, DURANTE UN MODO DE ADQUISICION INICIAL, EL INTERVALO DE RETARDO ES RELATIVAMENTE AMPLIO, DEL ORDEN DE UN TIEMPO DE CHIP DE CODIGO DE PRN APROXIMADAMENTE. SIN EMBARGO, UNA VEZ ALCANZADO EL SINCRONISMO DE CODIGOS DE PRS, EL INTERVALO DE RETARDO DE CODIGO ES MENOR, A UNA FRACCION DE UN TIEMPO DE CHIP DE CODIGO DE PRN. ESTE EQUIPO PRESENTA GRANDES VENTAJAS, ESPECIALMENTE EN ENTORNOS EN DONDE LA DISTORSION DEBIDA A LA PROPAGACION POR TRAYECTORIA MULTIPLE DE LA SEÑAL COMPUESTA RECIBIDA ES DEL MISMO ORDEN DE MAGNITUD QUE UN TIEMPO DE CHIP DE CODIGO DE PRN.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US82566592A | 1992-01-24 | 1992-01-24 |
Publications (1)
Publication Number | Publication Date |
---|---|
ES2141129T3 true ES2141129T3 (es) | 2000-03-16 |
Family
ID=25244629
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES93300469T Expired - Lifetime ES2141129T3 (es) | 1992-01-24 | 1993-01-22 | Receptor telemetrico de ruido pseudoaleatorio que compensa la distorsion por camino multiple a base de ajustar dinamicamente el intervalo de retardo entre correlaciones tempranas y tardias. |
Country Status (9)
Country | Link |
---|---|
EP (1) | EP0552975B1 (es) |
CN (1) | CN1031843C (es) |
AT (1) | ATE187254T1 (es) |
AU (1) | AU660757B2 (es) |
CA (1) | CA2087909C (es) |
DE (1) | DE69327119T2 (es) |
DK (1) | DK0552975T3 (es) |
ES (1) | ES2141129T3 (es) |
SG (1) | SG43672A1 (es) |
Families Citing this family (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5414729A (en) * | 1992-01-24 | 1995-05-09 | Novatel Communications Ltd. | Pseudorandom noise ranging receiver which compensates for multipath distortion by making use of multiple correlator time delay spacing |
DE69429505T2 (de) * | 1993-10-14 | 2002-06-20 | Ntt Docomo Inc | Korrelationsdetektor und nachrichtengerät |
US5615232A (en) * | 1993-11-24 | 1997-03-25 | Novatel Communications Ltd. | Method of estimating a line of sight signal propagation time using a reduced-multipath correlation function |
FR2733106B1 (fr) * | 1995-04-11 | 1997-06-06 | Asulab Sa | Boucle a verrouillage de delai pour utilisation dans un recepteur de signaux gps |
US6023489A (en) * | 1995-05-24 | 2000-02-08 | Leica Geosystems Inc. | Method and apparatus for code synchronization in a global positioning system receiver |
AU714888B2 (en) * | 1995-08-09 | 2000-01-13 | Magellan Corporation | Multipath error reduction in a spread spectrum receiver for ranging applications |
US5953367A (en) * | 1995-08-09 | 1999-09-14 | Magellan Corporation | Spread spectrum receiver using a pseudo-random noise code for ranging applications in a way that reduces errors when a multipath signal is present |
FR2739695B1 (fr) * | 1995-10-06 | 1997-11-07 | Sextant Avionique | Recepteur large bande a mesure de distance par signaux de code pseudo-aleatoire |
FR2741761B1 (fr) * | 1995-11-27 | 1998-02-13 | Centre Nat Etd Spatiales | Procede de reduction autonome des deuils d'acquisition et de poursuite des codes d'etalement de spectre recus en orbite |
JPH09261128A (ja) * | 1996-03-22 | 1997-10-03 | Matsushita Electric Ind Co Ltd | スペクトル拡散通信機 |
US5901183A (en) * | 1996-09-25 | 1999-05-04 | Magellan Corporation | Signal correlation technique for a receiver of a spread spectrum signal including a pseudo-random noise code that reduces errors when a multipath signal is present |
JPH10303782A (ja) * | 1997-04-30 | 1998-11-13 | Matsushita Electric Ind Co Ltd | Cdma受信装置 |
US6263448B1 (en) | 1997-10-10 | 2001-07-17 | Rambus Inc. | Power control system for synchronous memory device |
US6154821A (en) | 1998-03-10 | 2000-11-28 | Rambus Inc. | Method and apparatus for initializing dynamic random access memory (DRAM) devices by levelizing a read domain |
CN1214252C (zh) * | 1998-09-15 | 2005-08-10 | 三星电子株式会社 | 提高卫星导航系统接收信号的抗噪声性的方法及实现该方法的装置 |
GB9826044D0 (en) * | 1998-11-28 | 1999-01-20 | Koninkl Philips Electronics Nv | Receiver for DS-CDMA signals |
DE10061988C2 (de) * | 2000-12-13 | 2003-02-27 | Deutsch Zentr Luft & Raumfahrt | Vorrichtung und Verfahren zum Berechnen einer Korrelation zwischen einem Empfangssignal und einem Referenzsignal und Simulator |
CA2387891A1 (en) | 2001-06-08 | 2002-12-08 | Asulab S.A. | Radiofrequency signal receiver with means for correcting the effects of multipath signals, and method for activating the receiver |
DE60130102T2 (de) * | 2001-06-08 | 2008-05-15 | Asulab S.A. | Empfänger für Funksignale mit Mitteln zur Korrektur der Mehrwegeffekte und Verfahren |
US7995683B2 (en) * | 2007-10-24 | 2011-08-09 | Sirf Technology Inc. | Noise floor independent delay-locked loop discriminator |
FR2936892A1 (fr) * | 2008-10-08 | 2010-04-09 | Centre Nat Etd Spatiales | Systeme et procede de determination d'un recepteur, et recepteur associe |
JP6946296B2 (ja) * | 2015-12-16 | 2021-10-06 | コーニンクレッカ フィリップス エヌ ヴェKoninklijke Philips N.V. | 磁気共鳴イメージング(mri)システムのための無線通信のためのシステム及び方法 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4754465A (en) * | 1984-05-07 | 1988-06-28 | Trimble Navigation, Inc. | Global positioning system course acquisition code receiver |
JPS61770A (ja) * | 1984-06-13 | 1986-01-06 | Sony Corp | Gps受信機 |
WO1987003448A1 (en) * | 1985-11-30 | 1987-06-04 | Ferranti Plc | Tubular acoustic projector |
DE3808328C1 (es) * | 1988-03-12 | 1989-06-29 | Standard Elektrik Lorenz Ag, 7000 Stuttgart, De | |
AU643272B2 (en) * | 1990-06-04 | 1993-11-11 | Raytheon Company | Global positioning system receiver |
US5101416A (en) * | 1990-11-28 | 1992-03-31 | Novatel Comunications Ltd. | Multi-channel digital receiver for global positioning system |
-
1993
- 1993-01-22 DK DK93300469T patent/DK0552975T3/da active
- 1993-01-22 SG SG1995001647A patent/SG43672A1/en unknown
- 1993-01-22 ES ES93300469T patent/ES2141129T3/es not_active Expired - Lifetime
- 1993-01-22 AT AT93300469T patent/ATE187254T1/de not_active IP Right Cessation
- 1993-01-22 EP EP93300469A patent/EP0552975B1/en not_active Expired - Lifetime
- 1993-01-22 CA CA002087909A patent/CA2087909C/en not_active Expired - Lifetime
- 1993-01-22 DE DE69327119T patent/DE69327119T2/de not_active Expired - Lifetime
- 1993-01-22 AU AU31971/93A patent/AU660757B2/en not_active Expired
- 1993-01-24 CN CN93102392.0A patent/CN1031843C/zh not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
EP0552975A2 (en) | 1993-07-28 |
SG43672A1 (en) | 1997-11-14 |
CA2087909C (en) | 2004-04-06 |
AU3197193A (en) | 1993-07-29 |
AU660757B2 (en) | 1995-07-06 |
EP0552975A3 (en) | 1994-05-25 |
CN1031843C (zh) | 1996-05-22 |
DE69327119D1 (de) | 2000-01-05 |
DE69327119T2 (de) | 2000-06-21 |
EP0552975B1 (en) | 1999-12-01 |
CA2087909A1 (en) | 1993-07-25 |
DK0552975T3 (da) | 2000-03-27 |
ATE187254T1 (de) | 1999-12-15 |
CN1080059A (zh) | 1993-12-29 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
FG2A | Definitive protection |
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